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| Titel |
Atmospheric and oceanologic conditions favouring large bioproduction of northern Adriatic |
| VerfasserIn |
Romina Kraus, Davor Lucic, Jakica Njire, Tamara Djakovac, Robert Precali, Nastjenjka Supić |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250127748
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| Publikation (Nr.) |
 EGU/EGU2016-7656.pdf |
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| Zusammenfassung |
| An interdisciplinary study based on long term data collected in the northern Adriatic relieved
winter period to be crucial for the total annual zooplankton production in the region. Namely,
yearly averages of some investigated zooplankton species in the 2000-2007 interval were
highly related to their February and/or March abundances. The large winter zooplankton
abundances appeared in winters of the “A type”, in which freshened waters from the Po River
spread over the region. Also, the production of phytoplankton was in winters of the “A type”
higher than in winters of the “B type”, in which these waters are restricted to the coastal areas
and do not impact the open sea. That was presumably due to increase in nutrients. In fact, the
total inorganic nitrogen and ortophosphate concentration in eastern part reached
maximal February values in the 1990-2007 interval in winters of the “A type”.
Spreading of the Po River water across the northern Adriatic and appearance of
the two winter types depends on the existing geostrophic circulation patterns and
atmospheric and hydrologic conditions in the preceding months, thus enabling forecast.
Obtained results are basis for the future theoretical ecological model which can
explain long term changes in bioproduction in the region and be used in planning
future environment actions aimed to sustained development, especially as winter
phytoplankton and zooplankton production seems to reflect on annual catch of
small pelagic fish important for Adriatic fishery, anchovy (Engraulis encrasicolus). |
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